Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Global Circulation Models"”.
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The past and future climatic suitability of arabica coffee (Coffea arabica L.) in East Africa.
… climatic changes affect species distributions. Global circulation models suggest climatic change over the next century, and predict warmer temperatures, and increasingly variable precipitation in East Africa. Whilst several studies have modelled the potential impacts of future climatic change on …
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Application of a K-Nearest Neighbour weather generator for simulation of historical and future climate variables in the Upper Thames River basin
… in the future. Atmosphere-Ocean coupled Global Circulation Models (AOGCMs), often used in climate change research, have spatial resolutions that are too large to capture the local climate characteristics of a watershed. As a result, several downscaling tools have been developed, including …
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Simulating the characteristics of tropical cyclones over the South West Indian Ocean using an adaptive Stretched-Grid Global Climate Model
… the South West Indian Ocean (SWIO) have used Global Circulation Models (GCMs) with uniform grid. This study examines the capability of a GCM with adaptive grid stretching (CAM-EULAG, hereafter CEU) in simulating the characteristics of TCs over the SWIO. In the study, the CEU model is applied …
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The Gulf Stream: along-stream evolution of volume transport and water properties observed by underwater gliders
… limb of the Atlantic Meridional Overturning Circulation. Extensive observations collected using Spray autonomous underwater gliders from 2004 through 2020 fill a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, …
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The Gulf Stream: Along-stream evolution of volume transport and water properties observed by underwater gliders
… limb of the Atlantic Meridional Overturning Circulation. Extensive observations collected using Spray autonomous underwater gliders from 2004 through 2020 fill a 1500-km-long gap in longer-term sustained subsurface measurements of the Gulf Stream. The gliders provide concurrent, …
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Atmospheric radiative transfer in multiple scattering conditions. Application to NWP models.
… RT codes used in climate and weather prediction models. Cirrus clouds cover permanently 30% of the Earth's surface, representing an important contribution to the Earth-atmosphere radiation balance. The work has been focussed on the development of the RT model LBLMS. The model, widely tested in …
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Spatial Downscaling and Forecasting of Atmospheric Variables over Complex Terrain Using Machine Learning
… strongly influenced by topography. Traditional Global Circulation Models (GCMs), however, typically have a coarse spatial resolution that is unable to capture local scale variations, leading to limitations in regional climate applications. This thesis addresses these limitations by downscaling …
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The vulnerability of U.S. coastal energy infrastructure under climate change
… conditions as projected by four different Global Circulation Models (GCMs), we model the change in hurricane activity from present day climate conditions in response to a climate projected in 2100 under the IPCC A l B emissions scenario using hurricane analysis developed by Emanuel (5). We …
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Water resources planning and climate change adaptation strategies of Sardinian basins under water-limited conditions
… sources accessed by the trees. Ecohydrological models, coupled with climate projections from IPCC global circulation models, predict that rising temperatures and decreasing precipitation will lead to further reductions in vegetation cover (with up to a 50% decrease in Leaf Area Index), tree …
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An Investigation of the Distribution of Ozone-depleting Substances in the Upper Troposphere and Lower Stratosphere
Stratospheric transport in global circulation models and chemistry-climate models is an important component in simulating the recovery of the ozone layer as well as changes in the climate system. The Brewer-Dobson Circulation is not well constrained by observations and further investigation is …
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Seasonal and spatial structure of the gravity waves and vertical winds over the central USA derived from the NOAA Profiler Network data
… for improving gravity wave parameterizations in global circulation models.
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Radiative Transfer in the Martian Environment: In-Situ Results from the MSL Curiosity Rover and Laboratory Experimentation on Martian Regolith and Crystalline Rock Analogs
Global circulation models predicted a suppressed planetary boundary layer within Gale Crater prior to the landing of the Mars Science Laboratory. Images from Mars allow the amount of suspended dust near the crater floor to be estimated numerically. The atmosphere within the crater is shown to be …
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Assessment of Future Impact of Climate Change on Structural Protections and Hydrological Extremes – Floods
… of various climate change scenarios produced by Global Circulation Models (GCMs). The study created a statistical downscaling model called SDCRR, using the Volterra series realization, principal components, and ridge regression. The model was applied at four stations in the Manawatu catchment to …
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Air quality and climate change in the greater Cape Town area
… in detail for the year 2002. The large scale circulation and its link to temperature inversions are studied through the application of the Self-Organizing Maps technique using NCEP-DOE Reanalysis 2 data and making use of the findings for the year 2002. The synoptic states most associated with …
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Disentangling how climate change and forest management alter fuels and fire regimes in Sierra Nevada forests
… in the face of those changes.Simulation models provide a tool for projecting how climate change will influence future fire regimes, the extent to which shifting fire regimes will release carbon to the atmosphere, and when and where we can mitigate these changes through fuel treatments. …
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Approaches to quantifying and reducing uncertainty in GCMs over Southern Africa
Global Circulation Models (GCMs) are the primary tool for simulating future climate changes. These models by necessity make use of various assumptions and simplifications due to computational constraints, and in so doing introduce biases and systematic error. Along with other sources of uncertainty …
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The application of adaptive mesh modelling techniques to the study of open ocean deep convection
… plays a main role in driving the thermohaline circulation (THC) and hence has a potentially major role in climate. However, the mechanisms of OODC itself are not fully understood, and there is much debate surrounding how it contributes to THC. One difficulty is that OODC tends to occur …
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Impacts of climate changes on the spatiotemporal distribution of precipitation in the western United States
… the performance of current climate models on this variability, the influence of large-scale ocean oscillations on heavy precipitation, and the impact of human induced global warming on storm properties.</p> <p>The first study is to examine the performance of current climate models on …
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The impact of silvicultural strategies and climate change on carbon sequestration and other forest ecosystem functions
… has been given to the role of forests in the global carbon cycle and their management for increased carbon sequestration as a possible mitigation option against climate change. Furthermore, the use of harvested wood can contribute to the reduction of atmospheric carbon through (i) carbon …
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Climate change impacts and adaptation: a New Zealand dairy system : A thesis submitted in partial fulfilment of the requirements for the Degree of Master Master of Agricultural Science at Lincoln University
Pasture-based farming systems, as in New Zealand, are susceptible to changes in the climate through feed supply variability. Future climate change will likely alter pasture growth patterns, posing opportunities and risks that farmers will have to respond to and adapt to remain profitable. Due to …